Elena A. Schaefer, Catherine A. Gehring, Richard P. Phillips, Emma Gadrat, Justine Karst
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引用次数: 0
摘要
植物-菌根类型被认为是植物功能特征的一个整合因素，但目前对这些关系的了解大多来自对不同植物类群的研究，在这些研究中，菌根类型的影响无法被分离出来。除了影响碳-养分交换外，与不同菌根类型结合的植物往往在多个性状上存在差异，从而对无数地下过程产生影响。我们利用两个种植有小叶杨（一种能同时与丛枝菌根真菌（AM）和外生菌根真菌（ECM）结合的树种）的普通花园，研究了菌根类型优势在多大程度上影响根系性状以及整个根系经济空间的性状关系。虽然P. fremontii同时形成了AM和ECM结合，但个体表现出的菌根类型优势主要受花园位置的影响。低海拔花园中的树木，无论产地如何，主要由 AM 真菌定殖，而高海拔花园中的树木主要由 ECM 真菌定殖。在低海拔花园的根系中，AM 真菌的定殖率与特定根长呈负相关，这表明对觅食根的投资是权衡利弊的结果。相反，在高海拔花园的根系中，ECM 的定植率与根组织密度呈负相关，这表明在资源获取与根系生长/防御之间可能存在权衡。菌根类型之间的所有其他根系经济性状保持相似。虽然以 AM 和 ECM 为主导的树木（和花园）之间的根系性状差别不大，但它们之间的关系在每个花园中都有所不同，这表明在一个物种中存在独特的策略和性状权衡。随着全球变化不断改变环境，像P. fremontii这样经历了一系列非生物条件的物种，可能预示着其他树种会如何改变根系的性状和策略以应对变化。在期刊博客上免费阅读本文的通俗摘要。
期刊介绍：
Functional Ecology publishes high-impact papers that enable a mechanistic understanding of ecological pattern and process from the organismic to the ecosystem scale. Because of the multifaceted nature of this challenge, papers can be based on a wide range of approaches. Thus, manuscripts may vary from physiological, genetics, life-history, and behavioural perspectives for organismal studies to community and biogeochemical studies when the goal is to understand ecosystem and larger scale ecological phenomena. We believe that the diverse nature of our journal is a strength, not a weakness, and we are open-minded about the variety of data, research approaches and types of studies that we publish. Certain key areas will continue to be emphasized: studies that integrate genomics with ecology, studies that examine how key aspects of physiology (e.g., stress) impact the ecology of animals and plants, or vice versa, and how evolution shapes interactions among function and ecological traits. Ecology has increasingly moved towards the realization that organismal traits and activities are vital for understanding community dynamics and ecosystem processes, particularly in response to the rapid global changes occurring in earth’s environment, and Functional Ecology aims to publish such integrative papers.
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